Effect of Ce addition on the microstructure and properties of Al-Cu-Mn-Mg-Fe lithium battery shell alloy

Journal Article · Wed Aug 15 04:00:00 EDT 2018 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2018.05.049· OSTI ID:22805087

Du, Jiandi; Ding, Dongyan; Zhang, Wenlong; Xu, Zhou ^[1]; Gao, Yongjin; Chen, Guozhen; You, Xiaohua ^[2]; Chen, Renzong; Huang, Yuanwei; Tang, Jinsong ^[3]

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1. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240 (China)
2. Huafon NLM Al Co., Ltd, Shanghai 201506 (China)
3. Shanghai Huafon Materials Technology Institute, Shanghai 201203 (China)

Highlights: • Al{sub 6}(Mn, Fe) particles could be remarkably refined by Ce alloying. • Ce addition to the alloy promoted precipitation of S' phase. • Ce-containing alloy had higher tensile strength than that of Ce-free alloy. • Ce-containing alloy had positive corrosion potential and lower corrosion current density. - Abstract: Effect of Ce addition on the microstructures, mechanical properties and electrochemical properties of Al-Cu-Mn-Mg-Fe lithium battery alloy was investigated by optical microscope (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), tensile testing and electrochemical testing. Experimental results indicate that Ce addition resulted in the formation of Al{sub 8}Cu{sub 4}Ce phase in the Al-Cu-Mn-Mg-Fe alloy. The Ce-containing precipitates nucleated and grew up along the surface of Al{sub 6}(Mn, Fe) precipitates. Al{sub 6}(Mn, Fe) precipitates could be remarkably refined by Ce alloying. The aging precipitation behavior of S' phases could be promoted after Ce addition to the alloy. In comparison with Ce-free alloy, the Ce-containing alloy had higher tensile strength at both low temperature and elevated temperature. Especially at 200 °C, the yield strength and tensile strength of Ce-containing alloy substantially increased by 23.4% and 27.08%, respectively. Potentiodynamic polarization testing indicated that the Ce-containing alloy had a more positive corrosion potential and a lower corrosion current density.

• OSTI ID: 22805087
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Vol. 142; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALLOY SYSTEMS
ALUMINIUM COMPOUNDS
CERIUM ADDITIONS
COPPER COMPOUNDS
CORROSION
CURRENT DENSITY
ELECTROCHEMISTRY
IRON COMPOUNDS
LITHIUM ION BATTERIES
MAGNESIUM COMPOUNDS
MANGANESE COMPOUNDS
MICROSTRUCTURE
PRECIPITATION
SCANNING ELECTRON MICROSCOPY
SHELLS
TENSILE PROPERTIES
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
YIELD STRENGTH